Imaging flaws in thin metal plates using a magneto-optic device

Wincheski, B.; Prabhu, D. R.; Namkung, M.; Birt, E. A.

An account is given of the capabilities of the magnetooptic/eddy-current imager (MEI) apparatus in the case of aging aircraft structure-type flaws in 2024-T3 Al alloy plates. Attention is given to images of cyclically grown fatigue cracks from rivetted joints in fabricated lap-joint structures, electrical discharge machining notches, and corrosion spots. Although conventional eddy-current methods could have been used, the speed and ease of MEI's use in these tests is unmatched by such means. Results are displayed in real time as a test piece is scanned, furnishing easily interpreted flaw images.

Document ID

19930034673

Document Type

Conference Paper

Authors

Wincheski, B. (NASA Langley Research Center Hampton, VA, United States)

Prabhu, D. R. (NASA Langley Research Center; AS&M, Inc. Hampton, VA, United States)

Namkung, M. (NASA Langley Research Center Hampton, VA, United States)

Birt, E. A. (NASA Langley Research Center; AS&M, Inc. Hampton, VA, United States)

Date Acquired

August 15, 2013

Publication Date

January 1, 1992

Publication Information

Publication: In: Review of progress in quantitative nondestructive evaluation. Vol. 11A; Proceedings of the 18th Annual Review, Brunswick, ME, July 28-Aug. 2, 1991 (A93-18576 05-38)

Subject Category

Distribution Limits

Public

Other

NTRS

NTRS - NASA Technical Reports Server